The City Gardener: Prickly but pleasing cacti 

Opinion writers aren’t meant to offer tepid defences of things. We’re meant to be strong and certain. I’ve always thought the admonition to be stupid, since some things thoroughly deserve a sort-of defence. Floor crossing is one of those things. Last week, former Conservative member of Parliament Matt Jeneroux left his party to cross the floor to the Liberals. Previously, he said he would leave the Commons. His move strengthens the governing side’s standing in the legislature, putting them within reach of a majority and, in the meantime, buttressing their “working” equivalent of one....